merges r20342 from trunk to ruby_1_9_1.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@20405 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges r20342 from trunk to ruby_1_9_1.
%B, and %h. [ruby-dev:37162]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@20405 b2dd03c8-39d4-4d8f-98ff-823fe69b080e